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Oxidation of lignin-carbohydrate complex by laccase/Co(salen) one-pot catalysis

Lignin-carbohydrate complex (LCC) is hybrid structures containing covalently linked moieties of lignin and carbohydrates. The nature and amount of LCC affect both industrial processes and practical applications of lignocellulosic biomass. Herein, the LCC was isolated from bamboo by successive solven...

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Main Author: Zhou, Xue-Fei
Format: Article
Language:English
Published: Penerbit Universiti Kebangsaan Malaysia 2022
Online Access:http://journalarticle.ukm.my/19158/1/7.pdf
http://journalarticle.ukm.my/19158/
https://www.ukm.my/jsm/malay_journals/jilid51bil3_2022/KandunganJilid51Bil3_2022.html
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spelling my-ukm.journal.191582022-08-01T03:49:28Z http://journalarticle.ukm.my/19158/ Oxidation of lignin-carbohydrate complex by laccase/Co(salen) one-pot catalysis Zhou, Xue-Fei Lignin-carbohydrate complex (LCC) is hybrid structures containing covalently linked moieties of lignin and carbohydrates. The nature and amount of LCC affect both industrial processes and practical applications of lignocellulosic biomass. Herein, the LCC was isolated from bamboo by successive solvent extraction and precipitation. The effects and mechanism of LCC oxidation respectively by laccase, Co(salen), and laccase/Co(salen) in the presence of molecular oxygen have been investigated by composition analysis using the standard of National Renewable Energy Laboratory (NREL) and high-performance anion exchange chromatography (HPAEC), GPC, FTIR, and 2D-HSQC NMR. We can conclude that the laccase/Co(salen) one-pot catalysis modified the LCC in such a way that more carbohydrate was removed from the LCC with lower molecular weight of LCC as shown by GPC; the catalytic treatments produced oxidation at lignin side-chains and cleavage of lignin β-O-4’, β-β’ and β-5’ bonds in LCC, and cleavage of benzyl-sugar ether, phenyl glycoside and γ-ester bonds in LCC, as shown by FTIR and 2D-HSQC NMR, especially after the laccase/Co(salen) one-pot treatment. The further insight of LCC degradation was discussed in light of the results obtained in oxidation of the LCC model compound coniferin. Penerbit Universiti Kebangsaan Malaysia 2022-03 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/19158/1/7.pdf Zhou, Xue-Fei (2022) Oxidation of lignin-carbohydrate complex by laccase/Co(salen) one-pot catalysis. Sains Malaysiana, 51 (3). pp. 723-732. ISSN 0126-6039 https://www.ukm.my/jsm/malay_journals/jilid51bil3_2022/KandunganJilid51Bil3_2022.html
institution Universiti Kebangsaan Malaysia
building Tun Sri Lanang Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Kebangsaan Malaysia
content_source UKM Journal Article Repository
url_provider http://journalarticle.ukm.my/
language English
description Lignin-carbohydrate complex (LCC) is hybrid structures containing covalently linked moieties of lignin and carbohydrates. The nature and amount of LCC affect both industrial processes and practical applications of lignocellulosic biomass. Herein, the LCC was isolated from bamboo by successive solvent extraction and precipitation. The effects and mechanism of LCC oxidation respectively by laccase, Co(salen), and laccase/Co(salen) in the presence of molecular oxygen have been investigated by composition analysis using the standard of National Renewable Energy Laboratory (NREL) and high-performance anion exchange chromatography (HPAEC), GPC, FTIR, and 2D-HSQC NMR. We can conclude that the laccase/Co(salen) one-pot catalysis modified the LCC in such a way that more carbohydrate was removed from the LCC with lower molecular weight of LCC as shown by GPC; the catalytic treatments produced oxidation at lignin side-chains and cleavage of lignin β-O-4’, β-β’ and β-5’ bonds in LCC, and cleavage of benzyl-sugar ether, phenyl glycoside and γ-ester bonds in LCC, as shown by FTIR and 2D-HSQC NMR, especially after the laccase/Co(salen) one-pot treatment. The further insight of LCC degradation was discussed in light of the results obtained in oxidation of the LCC model compound coniferin.
format Article
author Zhou, Xue-Fei
spellingShingle Zhou, Xue-Fei
Oxidation of lignin-carbohydrate complex by laccase/Co(salen) one-pot catalysis
author_facet Zhou, Xue-Fei
author_sort Zhou, Xue-Fei
title Oxidation of lignin-carbohydrate complex by laccase/Co(salen) one-pot catalysis
title_short Oxidation of lignin-carbohydrate complex by laccase/Co(salen) one-pot catalysis
title_full Oxidation of lignin-carbohydrate complex by laccase/Co(salen) one-pot catalysis
title_fullStr Oxidation of lignin-carbohydrate complex by laccase/Co(salen) one-pot catalysis
title_full_unstemmed Oxidation of lignin-carbohydrate complex by laccase/Co(salen) one-pot catalysis
title_sort oxidation of lignin-carbohydrate complex by laccase/co(salen) one-pot catalysis
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2022
url http://journalarticle.ukm.my/19158/1/7.pdf
http://journalarticle.ukm.my/19158/
https://www.ukm.my/jsm/malay_journals/jilid51bil3_2022/KandunganJilid51Bil3_2022.html
_version_ 1740826818472050688
score 13.211869

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